NFO
Drives
AB
2021
201013
‐
2
Operating
and
Installation
Manual
36
5.13 Output signals
NFO Sinus units are equipped with outputs to allow monitoring of different states and parameters during operation.
For the outputs to display correct values, the motor parameters must be set correctly, see section 5.6.
5.13.1 Relay 1 (Alarm relay)
The alternating relay has a number of selectable functions used to indicate certain conditions. The default
configuration is to indicate an alarm in the inverter. This relay is located on terminals 13, 14 and 15 (see Fig.1).
With selected function active, the relay is activated (contacts 13-14 closed and 14-15 open). Exception: If
Alarm
function is selected, the relay is activated if no alarm condition exists (i.e. if an alarm is present, or if inverter is out
of power, the relay is deactivated and indicates alarm on contacts 14-15). The relay is galvanically separated from
other signals, and can handle 1 A, 50 V
DC
. Possible settings are shown in table 10, section Output.
5.13.2 Relay 2 (Run indication)
The alternating relay has a number of selectable functions used to indicate certain conditions. The default
configuration is to indicate the motor is running. This relay is located on terminals 16, 17 and 18 (see Fig.1). With
selected function active, the relay is activated (contacts 16-17 closed and 17-18 open). The relay is galvanically
separated from other signals, and can handle 1 A, 50 V
DC
. Possible settings in table 10, section Output.
5.13.3 Analog outputs
The analog outputs can deliver both voltage and current signals, where the current output reflects the voltage
output. The voltage range is ±10V and the current range ±20mA. Voltage output is at terminal 25 (AOUT1.U) and
terminal 27 (AOUT2.U), and current output at terminal 24 (AOUT1.I) and terminal 26 (AOUT2.I) respectively. Both
are related to any of the 0V terminals.
To scale the output, use parameter
Aout
[1|2]
Max
(= current (mA) and/or voltage (V) at nominal actual value).
Parameter
Aout
[1|2]
Mode
in parameter group
Output
, selects output function. Possible settings are shown in table
10, section Output.
If parameter
Ain Type
is set to
Pot,
AOUT2.U will always deliver 10V irrespective of
Aout2 Mode value.
5.14 Communication interfaces
The inverter is equipped with three communication ports: A RS485 multi-drop serial communication port, a USB
(device) port implementing a virtual COM-port, and a plug-in connector for Anybus CompactCom module which
accepts Profinet, Profibus and Modbus TCP fieldbus modules. Please contact NFO Drives for information regarding
sourcing and installation of CompactCom modules.
For the RS485 and USB ports, the user can select which bus/protocol type to use (Modbus RTU, Modbus ASCII or
NFO Classic), the bus/station address (1 – 126) of the inverter, and a timeout and autostop feature. Both RS485
and USB interface uses Modbus RTU and station address 1 as default. If several inverters are connected to the
same RS485 multi-drop line, their addresses must be set individually (e.g. 1, 2, 3, etc.). The inverter is always
considered to be a slave communication-wise, and will never start transmissions without previously receiving a
packet from a master.
The RS485 port also has setup for baudrate and line/character parameters (i.e. number of data bits, parity and stop
bits). Default setting for the RS485 port is 19200 bps, 8 data, even parity, 1 stop.
In addition, a failsafe (forced A/B idle line level) option can be activated for the RS485 port, which can be used if
the RS485 bus lines are subject to disturbances and/or asymmetric line load that causes the idle level to become
ambiguous.
3006469-2022-04
